PHYTOMYZA. 245 



c. Front black. 

 d. Wings greyish. 



e. Body black. Species 2. 

 e e. Body greyish-black. Species 3, 4. 

 d d. Wings white. Species 5. 

 c c. Front pale. Species 6. 



d. Legs black ; femora yellowish. Species 7. 

 d d. Legs yellow. Species 8. 

 b b. Body pale. 



c. Thorax with three grey stripes. Species 9. 



c c. Thorax without stripes. Species 10. 



c c c. Thorax with three luteous stripes. Species 11. 



1. lateralis, Fal. Phytomyz. 3. 2 (1820); Meig.; Mcq.; Zett. 

 Sonchi, Desv. Nigro-cinerea, capite, thoracis vittis lateralibus, halteri- 

 bus, abdominis suturis, genubusque flavis, vertice nigro, alis sublim- 

 pidis. Long. 1 ; alar- 3 lin. 



Greyish-black. Head yellow in front, pale-yellow beneath, and with 

 two pale-yellow stripes on the vertex; triangle of the ocelli black. 

 Antennae deep-black. Thorax and abdomen with a slender yellow 

 stripe on each side. Wings nearly limpid ; veins black, yellow towards 

 the base ; praebrachial vein ending at very little behind the tip of the 

 wing. Halteres pale-yellow. Hind borders of the abdominal segments 

 yellow, especially towards the tip. Legs black; knees yellow. Fern. 

 Abdomen subfusiform. 



Common. (E. S. I.) 



2. Aquifolii, Goureau, MSS. ; Desv. Rev. et Mag. Zool. 1851 

 (1851). Nigra, setosa, alis cinereis, halteribus flavis, genubus albidis. 

 Long. 1 ; alar. 2 lin. 



Black, bristly. Wings grey ; veins black, yellow at the base ; cubi- 

 tal vein ending much nearer to the tip of the wing than to the tip of 

 the radial ; prsebrachial vein ending at a little behind the tip. Halteres 

 pale-yellow. Abdomen rather haiiy. Legs black ; knees dingy-white. 



Common; appears ifi May. The larva undermines and feeds 

 on holly leaves. (E. S. I.) 



3. obscurella, Fal. Phytomyz. 4. 8 (1820); Meig.; Mcq.; Zett. 

 Nigro-cinerea, gracilis, alis subcinereis, halteribus albo-flavescentibus ; 

 Fcem. abdomine subfusiformi. Long. J 1 ; alar. 2-2| lin. 



Greyish-black, slightly bristly. Antennae black ; third joint round. 

 Wings greyish ; veins black ; cubital vein ending as near to the radial as 

 to the tip of the winy ; praebrachial ending on the hind border very 

 near the tip. Halteres yellowish-white. Legs black. Fern. Abdomen 

 subfusiform. 



Abundant in the spring. (E. S. I.) 



4. nigra? Meig. Z\v. vi. 191. 7 (1830). Nigro-cinerea, vim gra- 



